MATRIXSYNTH: The Man - The Legend: Dave Rossum Talks Filter Design

Soundtoys

Saturday, April 18, 2026

The Man - The Legend: Dave Rossum Talks Filter Design


video upload by Groove Synthesis

"Bob invited the iconic filter chip designer Dave Rossum to our booth at NAMM to talk about his filter designs. Caution: It gets super nerdy!

In the video, Dave shares the incredible story about how he came up with the design for the 2040 filter on a napkin over lunch with Tom Oberheim, how he avoided stepping on Bob Moog's toes when designing the 2144 filter, and what the sonic differences are between these two chips.

Groove's Bob Coover also talks about his thought process behind choosing the filters for the 3rd Wave Advanced Wavetable Synth. It's all about the grease and the groove!

Learn more about the 3rd Wave Advanced Wavetable Synth here: https://www.groovesynthesis.com

Chapters:
00:00 Introduction by Bob Coover
00:35 How Dave Rossum Developed the 2144 Filter Chip
02:54 Filter Design on a Napkin: The Story of the 2040/2140 Filter
04:07 The Differences between the 2140 And 2144 Filters
07:26 Why Bob Chose the 2140 Filter for the 3rd Wave"

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